Spring Boot 整合 Camunda 实现工作流

要将Spring Boot与Camunda工作流引擎整合起来，你可以按照以下步骤操作：

1. 创建一个Spring Boot项目。
2. 在pom.xml文件中添加以下依赖项：

<dependency>
    <groupId>org.camunda.bpm.springboot</groupId>
    <artifactId>camunda-bpm-spring-boot-starter</artifactId>
    <version>7.15.0</version>
</dependency>
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3. 创建一个Camunda配置类，并将其注解为@Configuration：

@Configuration
public class CamundaConfig {

}
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4. 在配置类中注入一个ProcessEngineConfigurationImpl实例，并配置数据库连接：

@Configuration
public class CamundaConfig {

    @Autowired
    private DataSource dataSource;

    @Bean
    public ProcessEngineConfigurationImpl processEngineConfiguration() {
        SpringProcessEngineConfiguration configuration = new SpringProcessEngineConfiguration();
        configuration.setDataSource(dataSource);
        configuration.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
        return configuration;
    }
}
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5. 在配置类中创建一个ProcessEngineFactoryBean实例，并将其注入为ProcessEngine：

@Configuration
public class CamundaConfig {

    // ...

    @Bean
    public ProcessEngineFactoryBean processEngineFactoryBean(ProcessEngineConfigurationImpl configuration) {
        ProcessEngineFactoryBean factoryBean = new ProcessEngineFactoryBean();
        factoryBean.setProcessEngineConfiguration(configuration);
        return factoryBean;
    }

    @Bean
    public ProcessEngine processEngine(ProcessEngineFactoryBean factoryBean) throws Exception {
        return factoryBean.getObject();
    }
}
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6. 在配置类中创建一个ProcessEngineRestServiceImpl实例，并将其注入为RestService：

@Configuration
public class CamundaConfig {

    // ...

    @Bean
    public ProcessEngineRestServiceImpl processEngineRestService(ProcessEngine processEngine) {
        ProcessEngineRestServiceImpl restService = new ProcessEngineRestServiceImpl();
        restService.setProcessEngine(processEngine);
        return restService;
    }

    @Bean
    public RestService restService(ProcessEngineRestServiceImpl restService) {
        return restService;
    }
}
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7. 在配置类中创建一个ProcessEngineAuthenticationFilter实例，并将其注入为FilterRegistrationBean：

@Configuration
public class CamundaConfig {

    // ...

    @Bean
    public FilterRegistrationBean<ProcessEngineAuthenticationFilter> processEngineAuthenticationFilter() {
        FilterRegistrationBean<ProcessEngineAuthenticationFilter> registrationBean = new FilterRegistrationBean<>();
        registrationBean.setFilter(new ProcessEngineAuthenticationFilter());
        registrationBean.addInitParameter("authentication-provider",
                "org.camunda.bpm.engine.rest.security.auth.impl.HttpBasicAuthenticationProvider");
        registrationBean.addUrlPatterns("/rest/*");
        return registrationBean;
    }
}
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8. 创建一个流程定义和服务类：

@Service
public class MyService {

    public void startProcess() {
        // ...
    }
}
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9. 创建一个REST控制器，并注入服务类：

@RestController
public class MyRestController {

    @Autowired
    private MyService myService;

    @PostMapping("/start-process")
    public void startProcess() {
        myService.startProcess();
    }
}
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10. 运行应用程序，并通过POST请求调用/start-process接口来启动流程。

以上是将Spring Boot与Camunda工作流引擎整合的基本步骤。你可以根据具体需求进行更多的配置和定制。